Mute two FIR BB tests due to LowPriorityInOverloadResolution in reflect

Recently second javaType function appeared in reflect and
now FIR can't correctly resolve the code :(.
Will be fixed after annotation deserialization full support

compiler/testData/codegen/box/reflection/mapping/types/createType.kt

+// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/mapping/types/typeParameters.kt

+// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // WITH_REFLECT